My son wanted to join up. I talked him out of it giving the very same sentiment you're expressing. Obama and his Democrats and his colluding RINO's in Congress aren't worth the bother. And neither are Arabs/Muslims/Afghans and the rest of the parasite heathens on earth. And that goes for Euro NATO countries too.
It's part of the Fundamental Transformation of America.
Communists/Jihadis have a mutual understanding that the only way they can ultimately win worldwide is to keep fundamentally transforming America until the country and Nation founded as a Constitutional Republic is finally destroyed.
The Leftist/jihadis are winning this current world war against civilization in a cake walk, all across the globe.